Process of preserving wood.



' senses re ress ossros. 1

RUDGYAEID 1. SMITH, 0F WASHIIQ'GTQIQ, DISTRICT (3F 313331331315 ASSIGHQB OF ORE- FOUB'IH TO MAUI) B. SMITH, 0F TALKOMAPAEK EISTBIGT 0F GQLUMBIA, AND ONE FQUBEH TO WILLSON H. KIQ'IGHT, 0F RARE, HABYLAND.

No Drawing.

To all whom it may concern Be it known that I, Roooranu l. Sunn a citizen of the United Ststee resirling at Washington, in the District of (kilumhhai. have invented certain new and. useful Imgovements in Processes of Preserving 00d, of whicht-he following is a speeifi cation;

My invention has to do with the preservation of wood by the saturation or impregnation of the wood with chrtain ehemieele To this end I employ a process which is not only economical in the mslteriiil to be used and capable of being carried out with an inexpensive equi went, but produces results not a tairia le with processes heretofore emplo ed.

Another object of my invention is to our ploy certain chemicals as above stated which when used .as hereinafter described; will cause a certain reaction to take piece in the wood which will result in the precipitation of an insoluble precipitate throughout the wood. Heretofore it has been (lilllcult to get sufiicient penetration for reasons that reservatives that are satisfactory as sterilizers will not enter freely into the pores of the wood or thoroughly attack the active fermenting contents of the wood.

One feature of my invention therefore consists in treating the woorl first, with a solution that enters freely into the innermost ores of the wood, and, then with a disin acting agent which follows freely wherever the first agent has penetrated, and the thor oughness of the process is thereby insured. For the first agent I referably select a solution-of an antiseptic nature to assist in disinfecting the fermenting properties of the wood, and this first agent is preferably a solvent ofthe fermenting content. Heretofore for the sake of economy, solutions of salts in water have been employed for purposes of preserving wood, but as here toforerectised, such solutions have been too rea ily washed out to develop any lasting effect."

Another feature of my invention consists in employing for both the first and subse-- quent solutions,'soluble salt in water, so that economy is attained, but! seleot such salts that will. enter and penetrate the innermost pores of the wood and remain indefinitely Application flied fiercmher I, 1%? 3t with my invention will not age-sis, also to treat the woml with he i wtlaout unue loss of s. or r n has removed from the .iirst solsiiou .lri carry invention ll prefer to eznplo e .wiinery eonnnereisl eonperes or iron sulfate for the first solo e; will or mapper fete for the subsequent treat 7116113; 1 re found it: i'ahsrt o, who tion or i H sulfate in the proportions of about e pound of iron sulfate to 2 gallons eeolotio'si of copper sulfate one oi one pound of copper gallons of writer in the sulfate to at at have fouzoil i. meniextk months, em even years, that wood thus tree-ted will with stand decay and be less liable to solit. I have also found that Wood tree in accordance leriorete when plotted in Water or subjeoieol to different atmospheric conditions. Furthermore, I have found that the original elasticity or resilionoy of the wood is not destroyed by thisit whioh consists in first seeking it in a so 11 tion of sulfate of iron natal then subjecb ing it to a solution of sulfate of copper.

In testimony whereof I alhx my signature in presenoe of two witnesses.

BUDGYARD I. SMITH. Witnesses;

EVA V. LEZTH, Doxmrzv S Kmerrm o solution of ordiusry blue vitriol 

